Monday Nov 30, 2009

Enterprise Tech Tip: Asynchronous Support in Servlet 3.0

The next release of the Servlet API, Servlet 3.0, which is part of the Java EE 6 Platform, adds support for asynchronous processing. That good news for developers who are working on applications that require long-lived client connections with a servlet. A good example of that kind of application is a chat application.

You can learn about some of the key features of this support such as new annotation attributes — yes, Servlet 3.0 now supports the use of annotations as an alternative to deployment descriptors — new classes, such as the AsyncContext class that provides the execution context for an asynchronous operation, and new servlet request methods, such as startAsync() for submitting an asynchronous request.

You can learn more about this support in Rajiv Mordani's Tech Tip Asynchronous Support in Servlet 3.0. Rajiv is the specification lead for Servlet 3.0.

Friday Jun 26, 2009

Enterprise Tech Tip: A Sampling of EJB 3.1

Enterprise JavaBeans (EJB) technology has taken a number of knocks in the past. When it was first introduced some, perhaps many, cried that it was too complicated, with a lot of programming overhead that made the technology needlessly difficult to use.

Over time things have improved dramatically. Features such as annotations in EJB 3.0 made the technology much, much easier to use. Those ease-of-use advancements continue with the upcoming release of EJB 3.1, which will be included in Java Platform, Enterprise Edition (Java EE) 6. A preview version of Java EE 6 is currently available for download. The preview version includes a nearly complete implementation of EJB 3.1

If you want to learn about some of the new, cool features in EJB 3.1, see the Tech Tip, A Sampling of EJB 3.1, written by Ken Saks, the EJB 3.1 Specifical Lead.

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